| Rocca Priora to Oegstgeest | 816.94 mi (1,314.74 km) |
| Rocca Priora to Oirschot | 758.13 mi (1,220.10 km) |
| Rocca Priora to Oisterwijk | 765.28 mi (1,231.59 km) |
| Rocca Priora to Oldebroek | 803.73 mi (1,293.48 km) |
| Rocca Priora to Oldenzaal | 777.24 mi (1,250.85 km) |
| Rocca Priora to Ommen | 798.62 mi (1,285.25 km) |
| Rocca Priora to Oosterend | 835.31 mi (1,344.29 km) |
| Rocca Priora to Oosterhout | 776.45 mi (1,249.57 km) |
| Rocca Priora to Oosterwolde | 830.63 mi (1,336.78 km) |
| Rocca Priora to Oostzaan | 822.81 mi (1,324.18 km) |
| Rocca Priora to Opmeer | 837.51 mi (1,347.84 km) |
| Rocca Priora to Oss | 769.48 mi (1,238.36 km) |
| Rocca Priora to Oud-Beijerland | 797.04 mi (1,282.71 km) |
| Rocca Priora to Oudenbosch | 780.96 mi (1,256.84 km) |
| Rocca Priora to Oudewater | 798.29 mi (1,284.73 km) |
